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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '211f22b287014bc83c418dcd789f5c626bf8cb0f1de7585abfa03f6bcd7c4ae9' 
  AND token = 'Wd0HH9rCOhQ14qZRl4uRyF+GLRCON+7Hsn/L8bNvaJ0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00033

JSON explain

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