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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '8acd72302405c9b21ff3f44be7aac10906893224d3685adb216c83048bd95e26' 
  AND token = 'XxdO8nIEXz+tw9uJW3V5wMy+/AIkL4PRQ5Z57nuWITE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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