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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '05cd3c92429a1a7a16acff87c22304aa3739fcadb217c78c74696ffe670c7b83' 
  AND token = 'RV+q93ihKRlliOb6fz92XWTXqMd4Zub5hitQKqpF+Ds=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00025

JSON explain

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