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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'c33f65e1977c53f250f0fdbcc70ebfd8704fc208f60c5558faac221c4bd34d4d' 
  AND token = '2pit7689pz7rr62a97LVIHXBNQ/swWek7TIHU4mw54Q=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00031

JSON explain

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