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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '5d05f3a45f89642238b33ea10a5a824040ece638d8e84e6ba137e32165a5ba28' 
  AND token = 'rZ6xYlaSZ6iIQd+CXrQrUpY31ZFiAE0a6McuC6dInRo=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00023

JSON explain

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