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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '58d72e6912994481e2d2b5baf4536fe10f712c9006ae6f06182d550c3c91e06e' 
  AND token = 'W32S0VQRmyv/O99n8/2ZUme9jbBXrFGBG+NdD7lzeLQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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