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SELECT 
  1 
FROM 
  vi_lock_keys 
WHERE 
  key_id = '00473663155a3606bb9e17b8e8af6c5cb6b66bcd6139f7eb742d15ea39030568' 
  AND token = 'qZAetpFDv6oOsIXRFLgQxN6Av1s1FJXnUTgGUr6ZDvg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00011

JSON explain

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