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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '65a9129248d5dfba445d67a85c2e4055a58b4bb6748bb6a1f7457a0a52b1cada' 
  AND token = 'pwMLbckBJAOGGtm/YuNDm6IX+kwVAVGlaHloQDiRLuo=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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