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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '077f077eceaa355f7a65b54db025ea3464d3dcc68d7348ea5d1866ec20ac2439' 
  AND token = 'sSy4UxA/ue2mj7MEYTicofdWy5r0N/oO68hKe0YbWUg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00090

JSON explain

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