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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '0d69f4eb4c83b51c94ca8b7d816f9345dcae02a6e5c64ccfad7a2c20e9507f99' 
  AND token = 'cGGSUT5AzK7/OoXV1Z7M1xT2LQUaKtyl84hEiCcFwis=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00032

JSON explain

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