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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'd220027f939a26bed1819368698f745e83a159575f5601a32dc5aa8472b5823b' 
  AND token = 't95xf6v4YK+YWtUUqxWMBU8o3qutbTJzc18+qWKaxXc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00016

JSON explain

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