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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '1b2f2072b6458f1ef7e77d9aac154c59555326d025ab90c9a95cd545623126f2' 
  AND token = 'SYGIXfDk3ezMLA11jsx9ahB/TELA0Bxd7jfVNWEzuz0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00037

JSON explain

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