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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '3bbd5ac87241927daa836a5e9d0fba0ac1714162046a1f40c4a67eb7966d6be0' 
  AND token = '0B7TZS2CpS3IHrBHhL8ijRiUZ2GBr/grd745/fFRA3Y=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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