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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '9ddb97b9a389da9c0be488090d981deef0c9ebc37c70965077a7ab27fe105061' 
  AND token = 'Q3dIeFaBOvuCTYlyPZAusCh/HW5HCZdvGhsJZRvI1CY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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