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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '6060ee398cf7d01e7ea4eb59446d3ff0b87a1006f61a8131535ede43f70efeb7' 
  AND token = 'zt9Z2G4O3zSs/btJx/XIAKkagTPkkfDumBOFP+1SUXA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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