SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '969425868a1654d33d5564711c16d71200a97ef3e3d539bcb76a01948e83d168' 
  AND token = 'U9wXf/KYYk7+HL75+/f6Cib5DGLZkvZnF4GBiAWpqNc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00027

JSON explain

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