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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'f5b2f4b3d96a5c0953f82cc5fe23df283add64fc0f176d59c29e3e3450279c72' 
  AND token = 'bcTidE1pHiwStcM2r7c24rWnO/yh7ldcMZoX7xh1xBE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00045

JSON explain

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