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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'b07a0d0d7e9b1bb15ea593f47442f8b558d2c2d424b053ae98e81dd0de977508' 
  AND token = 'LMwv5mzVL6zH5gsuRLx2O+slvb4eMRK78reeLIhe540=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00014

JSON explain

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