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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'fa7a9c38ced1ca31ad1bab87246dae20d1054187f6d462f051340004600d8043' 
  AND token = '/nJMGfTEN31fkcE9hMJNlbXZXI7L7i6f0OiKRWM2tqc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00128

JSON explain

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