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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'bd00aeae873e9ef6a83f48c8af1155f39ac29c4aeb2c10a498293e101128d678' 
  AND token = 'rAPzgWJDZzJQ68mq4nBOVkNrOa6keB11tLLQ4wfzPds=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00036

JSON explain

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