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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'a9d4ab46f6ef3bce2d0e27f4dd67b8e6da6ebfdc37dce5f20f63c6c7ed24a090' 
  AND token = 'HJPQsmHiSiCrhFd4gmorSQTHLRf2Caflz/Xv6A5T9G4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00031

JSON explain

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