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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'e60a22f5e8f314fe74202906b86cf9d7fbe6e89732873c903be2990e6906edb2' 
  AND token = 'tAaLigksGS8H0cOAgbblkx79E05yeYcs81GQUoQctiU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00080

JSON explain

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