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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '11b41a664a6933f944005365624b63174aa6e23566f3ca18836bb50c8930c9fd' 
  AND token = 'GVQziSGt0lE4uF2u2yMurmnb4gioEvRUKJzwwnzOntE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00099

JSON explain

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