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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'b466daf40a82581dc53569b31df127b5900bf64eee425831a898a0cb3bb2fcb9' 
  AND token = 'uc118GRK2ayEwDszSuZxAZBCBieZCEq65gBv7ayZ6i4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00015

JSON explain

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