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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '7367cb7de0fd4fbbb2e8f2a5261d12ff616d350d4869e89f57dde80410a8cfc6' 
  AND token = 'ODlcUoSzToOxwKa9KTo5ufnZlPFmAgPOOef1KKfEK7Q=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00038

JSON explain

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