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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '0a7009f6d519b062c8be6b16de9a62da987a156370ceff7a3dec5f7f3ce7f3e4' 
  AND token = 'Ea4dufPpo1vIR+kr+LbKhnFXlp9M3PKv3wfeD3oYav8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00024

JSON explain

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