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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '03c8472f40a471c4e4a1e1257495c5ae21e3ef3eec857b601bb0c68fce80259e' 
  AND token = 'zV7fV69ig50FD8xA7dtfASKP3NYta7kJplt8O+pEkp0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00016

JSON explain

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