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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'ee83120d83184e0cc57749db756357775de00ad63c5b7baa2d1d94aa132ee051' 
  AND token = 'ZpO91OigkQckyT7SLSN6fQ61vyXpnDl6RcoibjmKVQs=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00026

JSON explain

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