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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '2149ffd9c874a9e99508a67ad5127c1db9f61f60b0d22d9c95f348e3b34edc7d' 
  AND token = '+wxoDryEVeHWCDQhkPLoc1842D4Iv5eafACK5iqjq2U=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00039

JSON explain

{
  "query_block": {
    "select_id": 1,
    "message": "no matching row in const table"
  }
}