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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '2e05e43633812047f2a890102641ce6356672b70576761b8b5a1b4eb63182e0d' 
  AND token = 'bb7KARXjt3B86c8eHWg0OG7Fn+6wNEuqcvETrNEiVKY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00040

JSON explain

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