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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'd10ab85a1b65c9a2fc677d3f05653f505512b62e2b5124186cbed18187f797c7' 
  AND token = 'AJNXhJ5GORpPy5BOULeN6y9pS2IE4LhjGMpRrbbXrno=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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