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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '909934927517976b9d2481849cf0e0865f6a809c9fb89c31a3db1677de291cbe' 
  AND token = 'Kf7M2dJeATKUusaN03ELmgNeeQVXdpZ3A2yid0h12BU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00017

JSON explain

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