Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '9c791824f0f1d80c81775c8b91af7c73c09d3a3d7adc94fa46e0af09dd098573' 
  AND token = 'NYatCv/LtaPYMazTFamoUbVBR2GZaGG6OtxS7IGe0gk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00036

JSON explain

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