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SELECT 
  1 
FROM 
  vi_lock_keys 
WHERE 
  key_id = '5b004a8b131f56815465148f7c95bed1fdaeed717a4f088032f541b4436d2d22' 
  AND token = 'rPv/YQVQrgBb191R+Mt35X3RWt/WbnbQoWx49eZ1R/Y=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00009

JSON explain

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