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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '5427754f4dfae925fb6e74986a0e9574bfa2c9c335d370979714232548964536' 
  AND token = '8CO7Q+vo3L7UAPZHktzHQApALJaQy8shKZ2HDAaLmQA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00038

JSON explain

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