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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '04f330e9d9e1e5e8c18829cca856cf2ed5921391d30f4a3dbb0ab226b4f3338b' 
  AND token = 'RTDvRb3PlApStIfecIhWnkZMnldnDeR4Z6QtyvnsYP4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00045

JSON explain

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