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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'a65bfb092294ed1712a5ee6b0e16eb1622362c8cd5a406ebad54ab927ff2d1ab' 
  AND token = '4oQbwBStDCiD5aUJu/nZFr7JSDuX2vrKTofRYraxrXA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00020

JSON explain

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