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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '022b2435a55751ebf789c1614d9a04411127c92afc96b0c603fe763c468008a1' 
  AND token = 'YqKwuQK50pnm+H8o4FRU10Xn1WIe2W47P5Q7S4BzS4A=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00037

JSON explain

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