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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '0d04fea56630e795e72672ec6a073f0b0d03cd25a11bfa0bf27c9f2b87e46a64' 
  AND token = 'Xif91azbgr5dmfhyzZsDfnwEwYpGxN0fuylx0xddSV0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00033

JSON explain

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