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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '8e146cd9e4a38ce141abaf8b69b2664121e1921b0f40f5ad9de06873f6b41bde' 
  AND token = 'Dck7oKG8Oo8N+eP06M9CnZqbUrF0FTiDv8NzUCZGhXA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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