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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '9099e65eef3ba7d3a8bc22fdf68936fddb36ceb809a8607035c65dc435cef6c9' 
  AND token = 'UIdaPkWH9UF2ZmRrVAsT3vBSTT869nUGVRvGAkG1pU8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00026

JSON explain

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