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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '63961876af16a2670d05c3be6dcf0ed6c04031e9e7ef384aaedaa130b9bb93b1' 
  AND token = 'NIyyTUrG4mz5sccgnXnpX4MGmzM02FG8+JuK2n2/+YU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00046

JSON explain

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