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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '36df7a7b89df57bec7eae95b06ae1c9ad5ae77ee8f2e8e1792e563194ca00712' 
  AND token = 'hS/3Kz+31C5uTGPLez40t1Q+TzqG2eF3VQgzx0QD6VE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00045

JSON explain

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