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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '6ee9c1d5ac5455f0dc21d80521c6ee6dbaac0d830bf7a9cb4b0e695134f85b48' 
  AND token = 'qPwhecZRp9H5QZ/4eDRx1HirmPmQVkEG4K5G/Ufk11I=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00018

JSON explain

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