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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'c4dbaa8c107b1ba324911f800fb7e4caf4292dfb8b5c2806865d4b098c9a230a' 
  AND token = 'ItvVe2o3Jma9MaXuIGdWeg5HjwSpbuN8IAIg8gIkoqs=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00031

JSON explain

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