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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '820691f7e40419ae9d839fdad5ac0c5fdff8502862f814c572964bd34ba99ff8' 
  AND token = '4b5zyN/N4ed0ZyseE8WUyXbn6S0u6KcCp8P3L3Vf8Nc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00027

JSON explain

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