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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'addcf26e5ea4ba0df4ec5886d1e285139466ca4557202ea2ee338fb649338254' 
  AND token = 'RuBoo6CHZcrjIcRC5vAxTYI+pbl8+YLEhILzvg4tW0I=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00024

JSON explain

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