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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'd5c4809311d2e396dc1e8d521d149f04f42af0968eab35516af64a7908710554' 
  AND token = '3K+ay7y4NHcZ2R7u8u7/T4e7YeREtgowg4hJeDa1ul8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00016

JSON explain

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