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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'be0aa3a5f84be3835c73e481d17e5137d8952298f76550b0a36741973138c676' 
  AND token = 'eyvqdTvQxZVrqE+plJ9BI8FcpRoM5rh/HdXwyF5VPrc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00018

JSON explain

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