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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'dd263aae33d8cb7fb7e9d4f4946471bd2372834daac55094896ae9537428660b' 
  AND token = 'YlSsVk8IAZ5iv3T3VA4pRs+p9ShiIdRR3OqMOc+A9lA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00028

JSON explain

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