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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '0991bb45ac260ca76e7ae754254baec8ef8077828141d2ac3b52b759edcefd21' 
  AND token = 'Q4srFz0sPdRzDzmMXmLNP5rPbSD3JCgC6iGk/2E7AaI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00035

JSON explain

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