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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '60c709c63e905802ac20936b489370dd6f1c9d148c1d7581ca7ea6dbdfe8853e' 
  AND token = 'Tx+fKzoM7y7R5EsQDYRVL0UbrqJDdTR4RmtQhj8BkMc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00038

JSON explain

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