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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'fa87f9ff66ec556eef70deb2207aafe007a362b21737bc7010a774fc0aa6d0a0' 
  AND token = 'Max90xnUmHu01h6U/If/QEg1ZyyFSHISqR0xftMh1hE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00015

JSON explain

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