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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '03b595a50028eee578a8b9a6cc82709b2593a44175dfdb42d5ba5fd94e5dafa0' 
  AND token = '7ZcYC01OiGtEAKezLt74uuni3HUzd9a+v8INHB58VBk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00038

JSON explain

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