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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '4ba82bf32b10a5d926f4f57a0570e28ad5c16d57ee627e7d354aa11f22868cc1' 
  AND token = '2e81yykmXJV9qRn/jluC7MqCAXGX94yP+/4Oe4r1GHM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00044

JSON explain

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