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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '0d7387bcba4bcd6349c5e24ec3c8916127f42bfaa3f8bdf86371190273bdd25e' 
  AND token = 'COLkgUX3Ud4ObE9c08CKroPYF6Q6otLV20om1vdYvB8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00028

JSON explain

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