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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '1393f7a6bd337a0a742dea56ca1850e6c6dede3c609819da0020b47164666ec3' 
  AND token = 'geUaF2sPeSW0Ub7nX/iy1APwzjuC8RI8ffXO/kGLaCo=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00026

JSON explain

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