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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '0f0ab32cb32a9674dba6bfc34bd35569c00d6b494c7a46ab12a45eac94da5b33' 
  AND token = 'YJxMBvUX+EUTFEivk3yotLef2Kl9Fcu08Tcelxml6mA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00040

JSON explain

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