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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '05ab4610ee9e642e570ecde71baddc819c05cd0067f60ca92f8f85a3034ca18b' 
  AND token = '34qnhXHIqUXFnVy5hZDnBQu16M3NxSD1nOd1Vlkr1fU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00031

JSON explain

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