Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '5f7df60eede6261e413788d2590f528fd4c3e91cf0f6fb08858458cce7975910' 
  AND token = 'cSejDXwSIRIPv7adJ1n0y0V0sXJNnWip1KE+kVpmybA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00043

JSON explain

{
  "query_block": {
    "select_id": 1,
    "table": {
      "message": "Impossible WHERE noticed after reading const tables"
    }
  }
}