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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'be5900f8754e86d969ee6d02dc2782284bd09c6c7b56a3ff357a6de99a65fdbd' 
  AND token = 'lIf2seoTOxkSdhy+DAe4jPSnagS+Pme9sLpFBS4hgaE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00048

JSON explain

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