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SELECT 
  1 
FROM 
  vi_lock_keys 
WHERE 
  key_id = '5ce5dc409cd356567617b088a1cdce405d15c97bca9318452d3fba0b21a15ede' 
  AND token = 'KFyOwBpRQBIKIB6Dv4kOCqPqlRE9fjxw3N7V5Zd0YMU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00010

JSON explain

{
  "query_block": {
    "select_id": 1,
    "table": {
      "message": "Impossible WHERE noticed after reading const tables"
    }
  }
}